:root {
  --bg-page: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --radius-card: 14px;
  --radius-badge: 999px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --section-pad-x: clamp(1.25rem, 5vw, 2rem);
  --section-pad-y: clamp(2rem, 6vw, 3.5rem);
  --touch-min: 44px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

.hero {
  padding: var(--section-pad-y) var(--section-pad-x) clamp(1.5rem, 4vw, 2rem);
}

.hero__inner {
  max-width: 36rem;
  margin: 0 auto;
}

.hero__eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero__title {
  margin: 0 0 1rem;
  font-size: clamp(1.625rem, 5vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.hero__lead {
  margin: 0;
  font-size: clamp(1rem, 2.8vw, 1.0625rem);
  color: var(--text-muted);
  line-height: 1.65;
}

main {
  padding-bottom: var(--section-pad-y);
}

.section-title {
  margin: 0 0 1.25rem;
  font-size: clamp(1.125rem, 3vw, 1.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.topics__inner {
  max-width: 36rem;
  margin: 0 auto;
  padding: 0 var(--section-pad-x);
}

.topic-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.topic-card {
  position: relative;
  margin: 0;
  padding: 1.25rem 1.25rem 1.25rem calc(1.25rem + 2.75rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.topic-card__badge {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(37, 99, 235, 0.12);
  border-radius: var(--radius-badge);
}

.topic-card__title {
  margin: 0 0 0.35rem;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.3;
}

.topic-card__desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.cta {
  margin-top: clamp(1.5rem, 4vw, 2rem);
  padding: 0 var(--section-pad-x);
}

.cta__inner {
  max-width: 36rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2rem);
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.cta__title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.125rem, 3vw, 1.25rem);
  font-weight: 700;
}

.cta__text {
  margin: 0 0 1.25rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.cta__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch-min);
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  text-decoration: none;
  background-color: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.cta__button:hover {
  background-color: var(--accent-hover);
}

.cta__button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.footer {
  padding: 1.5rem var(--section-pad-x) 2rem;
  text-align: center;
}

.footer__copy {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}